#ifndef _MEMDC_H_
#define _MEMDC_H_

#pragma once

#include "SkinControls.h"

class CMemDC : public CDC 
{
private:	
	CBitmap		m_bitmap;		
	CBitmap*	m_oldBitmap;	
	CDC*		m_pDC;			
	CRect		m_rect;			
	BOOL		m_bMemDC;		
public:
	
	CMemDC(CDC* pDC, const CRect* pRect = NULL) : CDC()
	{
		ASSERT(pDC != NULL); 

		m_pDC = pDC;
		m_oldBitmap = NULL;
		m_bMemDC = !pDC->IsPrinting();

		if (pRect == NULL) {
			pDC->GetClipBox(&m_rect);
		} else {
			m_rect = *pRect;
		}

		if (m_bMemDC) {
			CreateCompatibleDC(pDC);
			pDC->LPtoDP(&m_rect);

			m_bitmap.CreateCompatibleBitmap(pDC, m_rect.Width(), m_rect.Height());
			m_oldBitmap = SelectObject(&m_bitmap);

			SetMapMode(pDC->GetMapMode());

			SetWindowExt(pDC->GetWindowExt());
			SetViewportExt(pDC->GetViewportExt());

			pDC->DPtoLP(&m_rect);
			SetWindowOrg(m_rect.left, m_rect.top);
		} else {
			m_bPrinting = pDC->m_bPrinting;
			m_hDC       = pDC->m_hDC;
			m_hAttribDC = pDC->m_hAttribDC;
		}

		FillSolidRect(m_rect, pDC->GetBkColor());
	}
	
	~CMemDC()	
	{		
		if (m_bMemDC) {
			m_pDC->BitBlt(m_rect.left, m_rect.top, m_rect.Width(), m_rect.Height(),
				this, m_rect.left, m_rect.top, SRCCOPY);			
			
			SelectObject(m_oldBitmap);		
		} else {			
			m_hDC = m_hAttribDC = NULL;
		}	
	}
	
	CMemDC* operator->() 
	{
		return this;
	}	

	operator CMemDC*() 
	{
		return this;
	}
};


#endif